JP4960293B2 - Thermal insulation panel and environmental test equipment - Google Patents

Description

  The present invention relates to a heat insulation panel and an environmental test apparatus.

Conventionally, as disclosed in Patent Documents 1 and 2 below, a heat insulating panel in which a plurality of panel materials such as sheet metal are assembled in a hollow shape and a heat insulating material is provided therein is known. This heat insulation panel has a configuration in which panel members are joined together at their ends. More specifically, the end portions of the panel material are bent, the bent end portions are overlapped and fastened with rivets, thereby forming a hollow shape. This heat insulation panel is used as the outer wall of the cooling storage, and if the pressure inside the box surrounded by the heat insulation panel fluctuates, a pressure difference is generated inside and outside the heat insulation panel, so that air flows through the joint between the panel materials. obtain. And when the pressure in a store | warehouse | chamber falls, external air may infiltrate into the heat insulation panel from the outside of the store | warehouse | chamber, and the water | moisture content contained in external air may be condensed and accumulate | stored in a heat insulation panel. In Patent Document 2, as a countermeasure, a seal material having a low water vapor transmission rate is provided at the joint portion of the panel material on the outside of the warehouse, while an opening is provided at the joint portion of the panel material on the inside of the warehouse. Thereby, intrusion of outside air from the outside of the cabinet is suppressed, and even if outside air has entered, the outside air is discharged to the inside of the cabinet and dew condensation in the heat insulating panel is suppressed. In addition, even the thing of patent document 1 is made to discharge | release the external air which penetrate | invaded in the heat insulation panel to the warehouse inner side by providing an opening part in the panel material inside a warehouse.
JP 2007-17144 A JP 2007-17145 A

  In the conventional heat insulation panels disclosed in Patent Documents 1 and 2, the outside air that has entered from the outside of the cabinet through the joint portion of the panel material is discharged to the inside of the cabinet, so that the outside air passes through the inside of the heat insulation panel. For this reason, it is inevitable that moisture remains in the heat insulation panel, although it is easy to release the outside air to the inside by providing an opening in the joint portion of the inside panel material. . In particular, if the temperature inside the warehouse is low, it is inevitable that condensation occurs in the heat insulation panel. Therefore, there is a problem that heat insulation performance of the heat insulation panel deteriorates due to repeated moisture accumulation.

  Therefore, the present invention has been made in view of the above points, and the object of the present invention is to reduce the condensation in the heat insulation panel and reduce the heat insulation performance by relaxing the pressure fluctuation in the heat insulation panel. And to prevent the occurrence of water leakage.

  In order to achieve the above-mentioned object, the present invention is a heat insulation panel comprising a hollow main body configured to be assembled with a plurality of panel members, and a heat insulating material provided inside the main body. The pressure adjustment has a buffer space communicating with the inside of the main body, and relaxes the pressure change in the main body by causing air to flow between the buffer space and the main body in accordance with the pressure change in the main body. It is the heat insulation panel provided with the part.

  In the present invention, when the air in the main body becomes hot and expands, the air in the main body flows into the buffer space. For this reason, even when the inside of the main body is heated, the pressure fluctuation in the main body can be reduced. On the other hand, when the air in the main body portion is cooled and contracts, the air in the buffer space flows into the main body portion. For this reason, even when the temperature in the main body is lowered, the pressure change in the main body can be relaxed. Accordingly, it is possible to suppress the outside air from entering the main body through the joint portion of the panel material constituting the main body, and thus it is possible to suppress dew condensation even in the main body. Therefore, according to the present invention, wetting of the heat insulating material and accumulation of moisture can be suppressed in the main body, and deterioration of the heat insulating performance can be suppressed. And since accumulation | storage of a water | moisture content can be suppressed in a heat insulation panel, it can suppress that a water leak arises from a heat insulation panel.

  Here, the pressure adjusting unit may include a deformable bag. In this aspect, since the bag body is easily deformed following the pressure fluctuation in the main body, the pressure fluctuation in the main body can be suppressed even when the temperature change amount in the main body is small.

  The present invention is an environmental test apparatus that can apply a thermal load to a sample in the test room by changing the temperature in the test room, and includes the wall body constituted by the heat insulating panel.

  In this invention, if the temperature in a test chamber changes, the inner wall surface temperature of the heat insulation panel which comprises a wall body will change according to it. For this reason, the air in the main body of the heat insulation panel contracts or expands according to the temperature change in the test chamber. . For this reason, the dew condensation in a main-body part can be suppressed, and it can suppress that the heat insulation performance of the wall body which comprises a test chamber deteriorates.

  Here, in the case where the wall body has an inlet / outlet for the sample, an opening / closing door that is formed in a hollow shape and is provided with a heat insulating material inside and can open / close the inlet / outlet; You may provide the communicating pipe which connects the inside of the main-body part of a panel, and the said opening-and-closing door. In this aspect, along with the temperature change in the test chamber, the temperature of the inner wall surface of the heat insulating panel constituting the wall body changes, and the temperature of the inner wall surface of the open / close door also changes. For this reason, the air in the main body part of the heat insulation panel and the air in the open / close door contract or expand according to the temperature change in the test chamber. At this time, the pressure fluctuation in the main body is mitigated by the buffer space of the pressure adjusting part, while the pressure fluctuation in the open / close door communicating with the inside of the main body through the communication pipe is also mitigated. For this reason, while being able to suppress the condensation in a main-body part, the condensation in an opening-and-closing door can be suppressed. Therefore, it can suppress that the heat insulation performance in an opening / closing door deteriorates, without providing a pressure adjustment part in an opening / closing door.

  As described above, according to the present invention, the pressure fluctuation in the heat insulating panel can be alleviated, so that condensation in the heat insulating panel can be suppressed, thereby reducing the heat insulating performance of the heat insulating panel. Can be suppressed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the environmental test apparatus 10 according to this embodiment includes a test chamber 12 that can store a sample W, and can apply a thermal load to the sample W stored in the test chamber 12. Is. In other words, this environmental test apparatus 10 is a thermal shock test apparatus that applies a thermal stress to the sample W by alternately exposing the sample W to a low temperature and a high temperature, or continuously exposes the sample W to an atmosphere of a predetermined condition and applies a thermal load to the sample W. It is configured as a constant temperature bath or a constant temperature and humidity chamber. Examples of the sample W include a printed board on which a semiconductor chip is mounted.

  The environmental test apparatus 10 includes a heating chamber 14, a cooling chamber 16, a wall 18 that defines the test chamber 12, and an open / close door 22 attached to the wall 18. The heating chamber 14 is a room for heating the air that circulates between the test chamber 12 and is used for raising the temperature in the test chamber 12. A heater 24 and a blower 26 are disposed in the heating chamber 14. The cooling chamber 16 is a room for cooling the air circulating between the test chamber 12 and is used for lowering the temperature in the test chamber 12. In the cooling chamber 16, a cooler 28, a blower 30, and an auxiliary heater 32 are disposed. The auxiliary heater 32 is driven when the air supplied to the test chamber 12 becomes lower than the target temperature.

  The high-temperature side partition wall 35 between the test chamber 12 and the heating chamber 14 is provided with a suction port 35a and a blow-out port 35b, and an open / close damper 35c is provided in each of the suction port 35a and the blow-out port 35b. ing. The suction port 35 a is an opening for introducing the air in the test chamber 12 into the heating chamber 14. The outlet 35 b is an opening through which high-temperature air heated in the heating chamber 14 flows into the test chamber 12. The open / close damper 35c opens the suction port 35a and the blowout port 35b when the temperature inside the test chamber 12 is raised, and closes the suction port 35a and the blowout port 35b when the temperature inside the test chamber 12 is lowered.

  The low-temperature side partition wall 36 between the test chamber 12 and the cooling chamber 16 is provided with a suction port 36a and a blow-out port 36b, and an open / close damper 36c is disposed in each of the suction port 36a and the blow-out port 36b. ing. The suction port 36 a is an opening for introducing the air in the test chamber 12 into the cooling chamber 16. The outlet 36 b is an opening through which low-temperature air cooled in the cooling chamber 16 flows into the test chamber 12. The open / close damper 36c opens the inlet 36a and the outlet 36b when the temperature in the test chamber 12 is lowered, and closes the inlet 36a and the outlet 36b when the temperature in the test chamber 12 is increased.

  The wall body 18 is composed of a wall body 20 constituting the test chamber 12, a wall body 19 constituting the heating chamber 14, and a wall body 21 constituting the cooling chamber 16. In either case, as shown in FIG. The heat insulating panel 40 includes a hollow main body 40a having a configuration in which a plurality of panel members 42 are assembled, and a heat insulating material 40b provided inside the main body 40a. The panel material 42 is made of, for example, a sheet metal such as a stainless steel plate, and the main body portion 40a of the heat insulating panel 40 is formed into a hollow shape by joining edges of the panel material 42 that is bent or a flat panel material 42, for example. Is formed. Specifically, for the panel material 42 on the outdoor side, the edge of the panel material 42 is bent, and the bent edges are overlapped and welded to form a joint 42a. The welding here may be spot welding, for example. A sealing material 45 is applied to the joint portion 42a between the panel members 42 so that external air does not enter the main body portion 40a through the joint portion 42a as much as possible. On the other hand, for the panel member 42 on the indoor side, the edge portions are bent and the bent edge portions are overlapped and welded. The welding at this weld 42c can be, for example, argon welding. All-around seal is made by argon welding. The heat insulating material 40b is a fibrous heat insulating material 40b such as glass wool. Since the panel material is made of metal such as sheet metal, the heat in the room is easily transmitted through the panel material 42, and the air in the main body 40 a is easily expanded and contracted due to the influence. In addition, you may comprise the heat insulating material 40b of the heat insulation panel 40 which comprises the cooling chamber 16 with resin which has open cells, such as a urethane foaming agent.

  The opening / closing door 22 is provided so as to be able to open / close a sample W entrance / exit provided in the wall body 20 constituting the test chamber 12. The opening / closing door 22 also has a heat insulating property like the wall body 20. That is, the open / close door 22 has a configuration in which a plurality of panel members 44 are assembled in a hollow shape and a heat insulating material 22a is disposed therein. The heat insulating material 22a is a fibrous heat insulating material 22a such as glass wool.

  As shown in FIG. 3, the environmental test apparatus 10 is provided with a communication pipe 46 that communicates the internal space ST of the wall body 20 with the internal SD of the open / close door 22. The communication pipe 46 is provided on the hinge side of the opening / closing door 22 and is configured to follow the opening / closing operation of the opening / closing door 22. Therefore, the interior of the open / close door 22 is always in communication with the internal space ST of the wall body 20 constituting the test chamber 12.

  The wall body 20 constituting the test chamber 12 is provided with a pressure adjusting unit 50 having a buffer space SB. The pressure adjusting unit 50 includes a bag body 50a and a duct 50b. The bag body 50a is a part that forms the buffer space SB, is made of a soft material such as polyethylene or vinyl resin, and is configured to be deformable. The duct 50b has one end connected to the bag 50a and the other end connected to the test chamber 12 so that the interior of the bag 50a and the internal space ST of the wall 20 constituting the test chamber 12 communicate with each other. Is connected to the outer wall 20a of the wall body 20 constituting the. The other end of the duct 50b penetrates through the panel member 42 constituting the outer wall 20a of the wall 20 and enters the wall 20 (heat insulating panel 40). Thereby, air can distribute | circulate between the interior SB of the bag 50a and the interior space ST of the wall 20 (heat insulation panel 40) via the duct 50b. If the pressure in the internal space ST of the wall body 20 is higher than the pressure in the bag body 50a, air moves from the internal space ST of the wall body 20 toward the inside of the bag body 50a to inflate the bag body 50a. On the other hand, if the pressure in the internal space ST of the wall body 20 is lower than the pressure in the bag body 50a, air moves from the inside of the bag body toward the internal space ST of the wall body 20 to contract the bag body 50a.

  The operation of the environmental test apparatus 10 configured as described above will be described. The operation described below is an operation for performing a thermal shock test in which the sample W in the test chamber 12 is alternately and repeatedly exposed to a high temperature atmosphere and a low temperature atmosphere.

  When the sample W is set in the test chamber 12 and exposed to a high temperature atmosphere, the inlet 35a and the outlet 35b of the high temperature side partition wall 35 are opened, while the inlet 36a and the outlet 36b of the low temperature side partition wall 36 are opened. close. Then, the heater 24 and the blower 26 are driven to heat the air in the heating chamber 14 and circulate the air heated to this high temperature between the heating chamber 14 and the test chamber 12. As a result, the inside of the test chamber 12 is heated to a predetermined temperature, maintained at this predetermined temperature for a certain period of time, and the sample W is exposed to a high temperature.

  During this high temperature exposure, the inner wall 20b of the wall body 20 constituting the test chamber 12 is heated by the high temperature air, and as a result, the internal space ST of the wall body 20 (heat insulating panel 40) is also heated. Along with this, air in the wall body 20 is expanded, but a part of the air flows into the bag body 50a through the duct 50b to inflate the bag body 50a, so that the pressure increase in the wall body 20 is alleviated. Similarly, the inner wall 22b of the open / close door 22 is heated and the air in the open / close door 22 expands, but a part of the air flows into the internal space ST of the wall body 20 through the communication pipe 46. The rise is also mitigated. Since the pressure rise in the wall body 20 and the open / close door 22 is suppressed, the air in the wall body 20 is prevented from leaking to the outside through the joint portion 42a between the panel members 42.

  When a certain time has elapsed, the suction port 35a and the blowout port 35b of the high temperature side partition wall 35 are closed, while the suction port 36a and the blowout port 36b of the low temperature side partition wall 36 are opened. Then, the cooler 28 and the blower 30 are driven to cool the air by the cooler 28 and to circulate the air cooled to the low temperature between the cooling chamber 16 and the test chamber 12. As a result, the inside of the test chamber 12 is lowered to a predetermined temperature, and is maintained at the predetermined temperature for a predetermined time, so that the sample W is exposed to low temperature. Thereafter, thermal stress can be applied to the sample W by alternately repeating high temperature exposure and low temperature exposure.

  During the low temperature exposure, the inner wall 20b of the wall body 20 constituting the test chamber 12 is cooled by the low temperature air, and as a result, the inner space ST of the wall body 20 (heat insulating panel 40) is also cooled. Along with this, the air in the wall body 20 is contracted, but since the air in the bag body 50a flows into the wall body 20 through the duct 50b by the contraction of the bag body 50a, the pressure drop in the wall body 20 is alleviated. Is done. In addition, the inner wall 22b of the open / close door 22 is similarly cooled and the air in the open / close door 22 contracts, but the air in the wall 20 flows into the open / close door 22 through the communication pipe 46, so the pressure in the open / close door 22 is reduced. The decline is also alleviated. For this reason, outside air is suppressed from flowing into the wall body 20 and the open / close door 22 through the joint portion 42 a between the panel members 42.

  As described above, in the present embodiment, when the air in the main body 40a of the heat insulating panel 40 becomes hot and expands, the air in the main body 40a flows into the buffer space SB. For this reason, even when the inside of the main body 40a is heated, the pressure fluctuation in the main body 40a can be reduced. On the other hand, when the air in the main body 40a becomes low temperature and contracts, the air in the buffer space SB flows into the main body 40a. For this reason, even when the inside of the main body 40a is cooled, the pressure fluctuation in the main body 40a can be reduced. Therefore, it is possible to suppress the outside air from entering the main body 40a through the joint portion 42a of the panel member 42 constituting the main body 40a, and thereby dew condensation can be suppressed even within the main body 40a. Therefore, wetting of the heat insulating material 40b and accumulation of moisture can be suppressed in the main body 40a, and deterioration of the heat insulating performance can be suppressed. And since it can suppress that a water | moisture content accumulates in the heat insulation panel 40, it can suppress that the water leak from the heat insulation panel 40 arises.

  Moreover, in this embodiment, since the pressure adjustment part 50 is provided with the bag body 50a which can deform | transform, the bag body 50a deform | transforms easily following the pressure fluctuation in the main-body part 40a. For this reason, even when the temperature change amount in the main body 40a is small, the pressure fluctuation in the main body 40a can be suppressed.

  Moreover, in this embodiment, since the communication pipe 46 which connects the interior space ST of the wall body 20 and the inside of the opening / closing door 22 is provided, the condensation in the main-body part 40a can be suppressed, and the condensation in the opening / closing door 22 can be prevented. Can be suppressed. Therefore, it is possible to suppress the heat insulation performance at the door 22 from being deteriorated without providing the pressure adjuster 50 in the door 22.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. In the embodiment, the internal space S of the wall body 18 forms the internal space SH of the wall body 19 constituting the heating chamber 14, the internal space ST of the wall body 20 constituting the test chamber 12, and the cooling chamber 16. Although shown about the structure partitioned off into the interior space SL of the wall 21, it is not restricted to this structure. That is, the internal space S of the wall body 18 includes the internal space SH of the wall body 19 constituting the heating chamber 14, the internal space ST of the wall body 20 constituting the test chamber 12, and the wall body 21 constituting the cooling chamber 16. The structure formed as one space over the internal space SL may be used. In this case, if the part to which the pressure adjusting unit 50 is attached communicates with the internal space ST of the wall 20 of the test chamber 12, the wall 19 constituting the heating chamber 14 is also the wall constituting the cooling chamber 16. 21 is okay. Therefore, the wall body 19 constituting the ceiling of the environmental test apparatus 10 is also possible.

  In the above-described embodiment, the configuration including the communication pipe 46 that communicates the internal space ST of the wall body 20 and the inside of the open / close door 22 is shown. However, depending on the size and configuration of the open / close door 22, the communication pipe 46 is omitted. Also good.

  In the said embodiment, although the pressure adjustment part 50 was set as the structure which has the bag body 50a and the duct 50b, it is not restricted to this. For example, the duct 50 b may be omitted and the bag body 50 a may be directly attached to the wall body 20. Even in this case, it is necessary to provide a through hole in the outer wall 20a of the wall body 20. Moreover, it may replace with the bag body 50a and you may comprise by what has the buffer space which can change internal volume easily, such as a piston and a bellows.

  Moreover, in the said embodiment, although it was set as 3 zone structure by which the indoor space divided by the wall 18 was divided into three spaces (the test chamber 12, the heating chamber 14, and the cooling chamber 16) by the heat insulation walls 35 and 36, It is not limited to this. For example, as shown in FIG. 4, it is good also as the environmental test apparatus 70 of the one tank structure where the indoor space divided by the wall 18 is not partitioned off by the heat insulation wall. In this environmental test apparatus 70, the indoor space is configured as the test chamber 12, and the test chamber 12 is configured to heat or heat the sample chamber 12 a in which the sample W is set and the air in the test chamber 12 by the partition plate 72. It is partitioned into an air conditioning chamber 12b to be cooled. The partition plate 72 is provided with a communication hole that allows the sample chamber 12a and the air conditioning chamber 12b to communicate with each other. A blower 26, a heater 24, a cooler 28, and the like are disposed in the air conditioning chamber 12b. By driving the blower 26, air circulates between the sample chamber 12a and the air conditioning chamber 12b. By driving the heater 24, the air in the test chamber 12 is heated while the cooler 28 is driven. By doing so, the air in the test chamber 12 is cooled. Also in this environmental test apparatus 70, the wall 18 is heated or cooled as the air in the test chamber 12 is heated or cooled, so that the air in the internal space ST (S) expands or contracts, and the bag. The body 50a expands or contracts. Therefore, similarly to the environment test apparatus 10 having a three-zone configuration, it is possible to suppress the deterioration of the heat insulation performance and the occurrence of water leakage. It should be noted that the above-described various forms can also be employed in the one-tank structure environmental test apparatus 70.

It is sectional drawing which shows roughly the whole structure of the environmental test apparatus which concerns on embodiment of this invention. It is sectional drawing which shows a part of wall body of the said environmental test apparatus roughly. It is sectional drawing which shows schematically a part of wall body and opening / closing door of the said environmental test apparatus. It is sectional drawing which shows schematically the environmental test apparatus of the aspect of one tank structure.

Explanation of symbols

SB buffer space W sample 10 environmental test apparatus 12 test room 18 wall body 20 wall body 22 open / close door 22a heat insulating material 40 heat insulating panel 40a main body portion 40b heat insulating material 42 panel material 42a joint portion 46 communicating pipe 50 pressure adjusting portion 50a bag body 50b duct

Claims (4)

A heat-insulating panel comprising a hollow main body having a structure in which a plurality of panel materials are assembled, and a heat insulating material provided inside the main body,
A pressure adjusting unit that has a buffer space communicating with the inside of the main body and relaxes the pressure change in the main body by causing air to flow between the buffer space and the main body in response to a pressure change in the main body. Insulated panel.   The said pressure adjustment part is a heat insulation panel of Claim 1 provided with the bag body which can deform | transform freely. An environmental test apparatus capable of applying a heat load to a sample in the test room by changing the temperature in the test room,
The environmental test apparatus provided with the wall body comprised by the heat insulation panel of Claim 1 or 2. The wall body has an inlet / outlet for the sample,
An opening / closing door that is formed in a hollow shape and has a heat insulating material disposed therein, and that can open and close the entrance / exit,
The environmental test apparatus according to claim 3, further comprising: a communication pipe that communicates the inside of the main body portion of the heat insulation panel and the inside of the opening / closing door.

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